Canon Kabushiki Kaisha

Hisatsugu Tahara

Shinichi Nakamura

Satoshi Kuroyanagi

Hiroshi Ozaki

Hideki Adachi

Taisei Fukada

Mitsuharu Takizawa

Satoshi Kaneko

Naoyuki Ohki

Tokuharu Kaneko

Masanori Miyata

Tomobumi Nakayama

Osamu Iwamoto

Yasuki Nakajima

Mitsuhiko Sato

Akio Ito

Yukimasa Iseki

Michiharu Masuda

Hiroshi Matsumoto

Akinobu Nishikata

Norifumi Miyake

Yoshihiko Suzuki

Shokyo Koh

Yukio Yokoyama

Hirohiko Tashiro

Masayuki Honma

Isamu Sato

Hideaki Furukawa

Masafumi Kamei

Noriyoshi Chizawa

Saijiro Endo

Hisaaki Senba

Yoshikuni Toyama

Yuji Morishige

Keisuke Hasegawa

Miho Nakayama

A clock signal is frequency-modulated and an image processing operation is executed synchronously with the frequency-modulated clock signal to generate image data which is stored in a memory. Image data written in the memory is read synchronously with a clock signal having a fixed frequency. The image data written in the memory synchronously with the frequency-modulated clock signal is therefore converted into the image data synchronizing with the clock signal having a fixed frequency. Data subjected to image processing synchronously with the frequency-modulated clock signal can be output on the recording apparatus side without any practical problem.

Image processing apparatus and method of the same, and storage medium

Image processing apparatus and method of the same and storage medium

An image forming apparatus is arranged to form an image with laser light emitted from a semiconductor laser source, and is constructed so as to protect the laser source from a breakdown, by regulating electric current flowing to the laser source no matter when an adjusting circuit for adjusting the light amount of the semiconductor laser source is apt to supply the electric current that could break the laser source, to the laser source. The apparatus is constructed in such structure that during an automatic light amount control period the laser light amount emitted from the semiconductor laser source is detected and a current source circuit is made inactive when the light amount detected is over a set light amount and that during periods other than the control period the electric current flowing to the semiconductor laser is detected and the current source circuit is made inactive when the light amount detected becomes over a fixed ratio times the current detected during the automatic light amount control period. In this way, the protection circuit can operate effectively anytime of emission of the laser source, so as to protect the laser source from the breakdown.

Laser control apparatus with a current detecting and interrupting system

An equipment controlling apparatus is composed of a counter for counting the operational number of the equipment, memories for storing data indicating the state of the equipment, a communication device for communicating on the stored data with a centralized control apparatus, which controls the communicated data intensively, and a controlling device for causing the stored data to be transmitted to the centralized control apparatus when the counter has counted a predetermined value.

Equipment control apparatus

An equipment control apparatus in a system having an input unit for entering data on the conditions of equipment from the equipment, a communication unit for communicating with the apparatus located at a distance, and a control unit for exerting control in such a way as to transmit the data to the apparatus located at a distance through the steps of interrupting communication once on receiving a call from the apparatus requesting the data and then calling the apparatus located at a distance via the communication unit.

An image forming apparatus has a reversing unit for reversing a sheet with an image formed and discharging the reversed sheet, a determining unit for determining whether the sheet with an image formed is reversed or not reversed with the reversing unit before the sheet is discharged and a page order control unit including a first mode of forming images of a plurality of pages in a first page mode and a second page mode of forming images of a plurality of pages in a second page mode different from the first page mode, wherein in accordance with whether the apparatus operates in the first mode or in the second mode, the determining unit determines whether the sheet with an image formed is reversed or not reversed with the reversing unit before the sheet is discharged.

Image forming apparatus and method and information processing system and

An image processing apparatus comprises: an inserting unit to insert a memory medium such as IC card or floppy disc which can be freely attached or detached and in which programs to control the image processing apparatus have been stored; a memory to store the program which has been read out from the memory medium and kind data indicative of the kind of program; a loading circuit to load the program stored in the memory medium into the memory; and a control unit to control the image processing apparatus in accordance with the program stored in the memory. In the case where the program has already been stored in the memory, the control unit controls the loading circuit in a manner such that when the kind data stored in the memory is the data indicative of a special program, the loading of the program from the memory medium to the memory is inhibited and, when the kind data stored in the memory is not the data indicative of the special program, the loading of the program from the memory medium to the memory is executed.

Image processing apparatus which can update program

A memory management control device and a memory management control method capable of preventing run away of an image processing apparatus caused by a rewrite to a memory, are provided. In rewriting a program stored in a flash memory 402 of a controller 400 included in an image processing apparatus, an operating state detector 500 detects the operating state of the image processing apparatus and transmits the detection result to an external apparatus 9. On the basis of this detected operating state, the external apparatus 9 performs rewrite control for the flash memory 402. If the image processing apparatus is in operation, or is in an intermediate state, an abnormal state, or a wait state, a rewrite action is executed after the state is canceled.

Memory management control device and method for performing rewrite on

Disclosed is an image heating device for a fixing device in image forming apparatus. The image heating device is provided with two heaters and an image fixing roller. The image fixing roller is heated by the two heaters, one having the heat distribution in the center and the other having the heat distribution in the end portion of the fixing roller. The heaters are alternately energized so that the power requirement is maintained limited. The energization time ratio of the heaters is suitably varied according to the sheet size in order to compensate the temperature loss in the end portions when the heating is conducted in the central portion only, or to reduce the temperature rise in the end portions, encountered when narrow sheets are consecutively passed, thereby preventing various drawbacks resulting from uneven temperature distribution on the fixing roller.

Image heating device capable of controlling activation of plural heaters

Equipment control apparatus having means to communicate with a

An equipment control unit is composed of equipment control means for controlling the operation of an equipment, communication control means for controlling the transmission and reception of data to and from an external device, and transfer means for transferring the data between the equipment control means and the communication control means.

Control of equipment and of communication with plural units of equipment

A method of managing an image forming apparatus by a remote computer comprises the steps of detecting an abnormal state in the image forming apparatus, transferring an error code corresponding to the kind of the detected abnormal state to the computer, selecting a predetermined program according to the transferred error code by the computer, transferring the selected predetermined program to the image forming apparatus by the computer, and executing the transferred predetermined program by the image forming apparatus. The predetermined program is a diagnosing program to examine the causes of a failure in the image forming apparatus.

Image forming apparatus for forming images in accordance with process

A machine monitoring apparatus includes an input device for receiving data from a machine, the data being indicative of a condition of the machine, a storage device for storing the received data, a communication device for communicating between the storage device and an external apparatus installed at a position separate from the machine, and a control device for inhibiting the communication device from transmitting the data stored in the storage device when a power supply for supplying the machine with electric power is turned off while the data is being received by the input device.

Communication control apparatus for monitoring a condition of an image

A power supply control apparatus includes an input device for receiving data from a machine, the data being indicative of a condition of a malfunction occurring in the machine; a communication device for communicating between the input device and an external apparatus installed at a position separate from the machine; and a power supply control device for controlling a supply of electric power to the machine. The communication device transmits the received data to the external apparatus, and based on the malfunction condition indicated by the data, the external apparatus transmits an instruction to the communication device to interrupt the supply of power to the machine. The power supply control device interrupts the supply of power to the machine in accordance with the instruction from the external apparatus.

Communication control apparatus for monitoring a condition of a machine

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Kawasaki, Japan

Hisatsugu Tahara